Question

Erika has a baking company and needs to purchase 17 pounds of flour for her cakes. The Baking Goods Store sells two different-sized bags of flour. The table shows the amounts of flour in the bag, the number of bags at the store, and the cost per bag of flour. Size Pounds 1 Bags for Sale 75 Cost per Bag Small $0.84 5 Large 4 4 $16.80 If Erika buys all of the large bags, how many small bags will she need? A. 7 small bags B. 12 small bags C. 28 small bags D. 71 small bags

Answer 1

There are 4 large bags, and each one has 4 pounds. Then, since she buys all of the large bags, she already has

`4*4=16`

16 pounds. So, she only needs

`17\text{ }(2)/(5)-16=1\text{ }(2)/(5)=(5)/(5)+(2)/(5)=(7)/(5)`

1 2/5 pounds more, this fraction is equals to 7/5 pounds. Since the small bags only contains 1/5 pounds of flour, then, she needs

`((7)/(5))/((1)/(5))=(7)/(5)*(5)/(1)=(7*5)/(5*1)=7`

7 small bags